<style>
  .iframe-container {
    position: relative;
    width: 100%;
    height: 100vh; /* 使用视口高度作为高度，也可以使用100% */
  }
  .iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
  }
</style>

<div class="iframe-container">
  <iframe src="https://h5.clewm.net/?url=qr61.cn%2ForoUUY%2FqD5Ue9o&hasredirect=1"></iframe>
</div>

